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Convicted wife-killer Gerard Baden-Clay has been paying other prisoners for protection as he serves his life sentence, prison sources have told 9NEWS.

Baden-Clay is being held at the Wolston Correctional Centre, after his murder conviction was last year reinstated by a judge over the slaying of his wife, Allison.

Prison guards say the frowned-upon practice often involves high-profile inmates, who fear for their safety, paying other prisoners to be “bodyguards” to leave him alone.

Inmates often hide the payments by asking friends and relatives on the outside to send cash through intermediaries into the accounts of prisoners.

The revelations come after the family of Allison Baden-Clay made an uncontested application in February for full administration of her estate, disallowing the accused from accessing any part of the $1 million in life insurance and superannuation policies.

Baden-Clay murdered Allison in their Brisbane home in April 2012, before telling police she had disappeared while on a late-night walk.

The charge was downgraded to manslaughter by the court of appeal in 2014, before it was reinstated to murder in 2016.